一种长周期伪码信号的跳跃式扩展重叠捕获方法

随着直扩技术的发展,为提高应用系统的信号质量,出现了长周期伪码信号。然而,正是由于长周期伪码的出现及广泛应用,引发了系统接收的同步搜索误差大、速度慢等关键问题。为此,针对长周期伪码特性,考虑现有方法的局限和不足,提出了一种跳跃式扩展重叠捕获方法,通过扩展分段的跳跃式重叠技术来扩大搜索范围及提高处理速度。仿真结果表明,新方法在捕获性能及处理速度、检测概率等方面都明显优于现有的方法。此研究可以为扩频信号的高效同步及系统应用提供技术基础。

A Jumping Spread Superposition Acquisition Method for Long Period Pseudo Code Signals

With the development of Direct Sequence Spread Spectrum technology,the long period pseudo code signals emerged in order to improve the signal quality of the application system. Whereas, the synchronization problems of the search error and the processing speed are derived by the long period pseudo code. Thus,a jumping spread superposition acquisition method is proposed,through studying the signal mechanism and characteristics based on the long period pseudo code,as well as the deficiencies and limitations of existing acquisition methods. The simulation results demonstrate that the new method is better than the traditional algorithms in the acquisition performance,the processing speed and the detection probability. The research will provide the technical foundation to the efficient spread spectrum signal synchronization and system application.